Question

A boy having a mass of 60 kg holds in hands a school bag of weight 40 N . With what force the floor will push up on his feet? plz answer with steps​

Answer 1

AnswEr :

• The force of the floor will push up on his feet = 640 N.

Explanation :

We are given with the mass of a boy as well as weight of a school bag, that is,

• Mass of a boy = 60 kg.
• Weight of a school bag = 40 N.

We have to find out the force of the floor will push up on his feet.

We know that weight is also a force which we exert on ground, such that,

• Weight = Mass × Acceleration due to gravity$.$

And we also know the value of acceleration due to gravity, that is,

• Acceleration due to gravity, g = 10 m/².

Now,

As we are given with the mass of a boy and acceleration due to gravity we know the required formula, that is,

⟶ F = mg.

Substituting the given values in the formula,

⇒ F = 60 × 10

⇒ F = 600

Now,

Total force exerted on ground by a boy,

⇒ F = 600 + 40

⇒ F = 640

Hence, force of the floor will push up on his feet is 640 N.

Answer 2

Answer:

$\huge\bf {Given}$

• Mass of boy (M) = 60 kg
• Weight of school bag (W) = 40 N

$\huge \bf To \: find$

Force (F)

$\huge \bf Solution$

Here,

we shall first find acceleration due to gravity.

So, the acceleration due to gravity will be 10 m/s.

$\huge \bf F = MG$

$\sf f = 60 \times 10$

$\sf \: f = 600 \:$

Now,

Finding total force extracted by boy

$\tt force = 600 + 40$

$\huge \bf force = 640$